You're a 5* Vanguard. You're filthy rich. All dreams perished. When you are below 5*, you dream of being a vanguard - a Knight in shining armor if you will. However, once you reach vanguard your main goals have died. That was the mistake I did to my main character.
Do not fall and think reaching vanguardhood is the pinnacle of your Spiral Knights goals! Think of the rest - experiment with weapons, become a merchant, found a guild that is constantly chatting, create bright ideas (tell people about Arcade stratums without having to walk to the Arcade [my weather idea I had before].. ), create fun activities for the public (trivias, hunts, races, contests / competitions, quests, errands, playerhunts [talk to specific players to get clues on which player to find next, leading to an end of some sort].. , 1v1 PvP setups, et cetera), and anything you can think of.
I have noticed every player who is not a vanguard dreams of becoming a vanguard, and thus, upon reaching vanguardhood, they then have nothing to do left for them. So take these words in heed. Play Spiral Knights for the fun of it, not just focusing on reaching endgame!
This is the exact reason why I've hardly paid a single cent toward this game, except for the GA pack and a few bundles of energy. Since then I've exhausted that energy pool, but it helped me get to my Vanguard status. Currently I have almost no money, but that's okay because it gives me a bit of a challenge. Currently I'm grinding for a Voltedge, a Sudaruska, a Shadowsun Set, and an Acheron.
So I'm kept busy even though I've been a Vanguard for quite a while. Not everyone has your problem.